Package selection

[alleekhaan]

Hi,
I want to use nRF52832 for a product.
I am a bit confused about the package selection.
I need QFN package but there are many different versions available.
Can someone help me with it?

Also,  i downloaded reference design.
It also has many different projects.

May i know what's the difference in each reference design?

Thanks

[Simonr]

Hi

The difference between the QFAA and QFAB package is the RAM and Flash memory, where the QFAB is a cheaper option with half the flash and RAM. This is specified here in the SoC revisions/variants. The different schematics and PCB files are different configs for how to set up using for example the DCDC regulator or NFC that are optional on the nRF52832.

Best regards,

Simon

[alleekhaan]

Hi Simonr 
Thanks for your reply.
What is the difference between dcdc and simple one?
NFC make sense that it might have function of NFC but what is DCDC
Also, i simply want to read Accelerometer I2C data and glow some leds.

Thanks

[Simonr]

The DCDC regulator can be used as an alternative to the default LDO regulator, which will reduce current consumption compared to when using the LDO regulator, but the DC/DC regulator requires an external LC filter to be connected. More details in section 18.1 of the nRF52832 product specification. Using the LDO should be perfectly fine for running an accelerometer and some LEDs.

You can also use the Online Power profiler to get an idea of how much power consumption you can save with the DCDC regulator compared to the LDO if that's of interest.

Best regards,

Simon